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HP D2D User Manual

HP D2D
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HP StoreOnce
Backup System Concepts Guide
Abstract
If you are new to the HP StoreOnce Backup System, it is a good idea to read this guide before you configure your system. It
describes the StoreOnce technology and advises how to plan the workload being placed on the HP StoreOnce Backup System
in order to optimize performance and minimize the impact of deduplication, replication and housekeeping operations competing
for resources.
IMPORTANT: The localized versions of this guide have been produced prior to launch. The English version that is available
on the web at launch may have later updates. Always check http://www.hp.com/support/manuals for the most up-to-date
documentation for your product.
HP Part Number: EH985-90915
Published: February 2011
Edition: 1

Table of Contents

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HP D2D Specifications

General IconGeneral
BrandHP
ModelD2D
CategoryStorage
LanguageEnglish

Summary

1 Before you start

Overview

Provides a general overview of the HP StoreOnce Backup System's purpose and configuration.

NAS targets for backup applications

Explains how to use NAS targets for backup applications and their features.

Virtual Tape Library targets for backup applications

Details VTL targets, their emulation types, and usage for backups.

Comparing NAS and Virtual Tape Library targets

Summarizes key differences between NAS and VTL targets for backup applications.

Connecting to the HP StoreOnce Backup System

Describes the primary methods for accessing and configuring the appliance.

For more information

Directs users to further resources for detailed information on VTL and NAS devices.

2 Virtual Tape Devices

Overview

Explains what Virtual Tape Devices are and how they function as backup targets.

Emulation types

Details the various library and drive emulation types supported by the system.

Creating and configuring virtual tape devices

Guides users through the process of creating and configuring VTL devices.

Limitations on the number of devices

Outlines the practical limitations on the number of VTL devices per host and appliance.

Flexible emulation (G2 products only)

Discusses the flexibility of ESL, EML, and D2DBS emulations for G2 products.

VTL devices on an Ethernet network

Explains how VTL devices are configured and operate over an Ethernet network.

Backup applications and Replication Target libraries

Describes how to make target libraries visible to backup applications for specific tasks.

VTL devices on Fibre Channel

Details the configuration and visibility of VTL devices on a Fibre Channel SAN.

Fibre Channel topologies

Explains supported Fibre Channel topologies for connecting VTL devices.

Zoning

Describes the importance and implementation of zoning for FC SANs.

3 NAS shares

Operating system support

Lists the supported interfaces (CIFS and NFS) for NAS shares.

Backup application support

Details which backup applications are compatible with NAS shares.

Maximum number of NAS shares

Specifies the total number of NAS shares that can be configured on an appliance.

Maximum number of files per NAS share and appliance

Defines limits on files per share and appliance, including deduplication threshold.

Maximum number of users per CIFS share

States the maximum number of users that can be configured for CIFS share access.

Maximum number of hosts per NFS share (G2 products only)

Specifies the maximum number of hosts that can access an NFS share.

4 Data deduplication

What is data deduplication?

Explains the process of data deduplication and its block-level operation.

Data deduplication and the HP D2D Backup System

Details how data deduplication is applied and its benefits within the system.

Tape rotation example with data deduplication

Provides an example showing space savings with data deduplication.

5 Replication

Replication overview

Introduces replication as a method for synchronizing data between locations.

HP StorageWorks Replication Manager (HP D2D4xxx Series only)

Describes the Replication Manager software for managing replication environments.

Replication concepts and terminology

Explains key terms and concepts related to HP StoreOnce replication.

Replication deployment strategies

Outlines common strategies for deploying replication, like Active-Passive.

Replication Licensing

Details the licensing requirements for enabling replication on the system.

Seeding the Target Appliance

Explains the process of seeding initial data to the replication target.

Recovering a Source Appliance

Describes methods for recovering data when a source appliance fails.

6 Housekeeping

What is housekeeping?

Explains the background process of removing deleted or unreferenced data chunks.

What effect does housekeeping have on performance?

Discusses how housekeeping operations can affect overall system performance.

Why is housekeeping important?

Highlights the significance of housekeeping for maximizing deduplication efficiency.

What do I need to do?

Provides guidance on configuring rotation schemes and managing housekeeping.

7 Performance

Optimizing peformance

Offers advice on optimizing system performance by managing workloads.

Balancing performance and deduplication ratios

Explains how to balance system performance with deduplication effectiveness.

To be avoided

Lists actions and configurations that should be avoided for optimal performance.

Glossary

A Tape Attach information for G1 products

Options for archiving to tape

Describes methods for archiving data to physical tape using G1 products.

About this guide

Intended audience

Specifies the target users for this documentation guide.

Related documentation

Lists other documents providing related information for the product.

Document conventions and symbols

Explains the conventions and symbols used throughout the document for clarity.

HP technical support

Customer self repair

Details the customer self-repair program for product maintenance.

Registering your HP D2D Backup System

Guides users on how to register their installed and tested backup system.

Subscription service

Recommends product registration for receiving updates and enhancements.

HP websites

Documentation feedback

Provides contact information for submitting comments and suggestions on documentation.

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